Solar cell



FIG. 1 is a front elevational view of a first embodiment of a solar cell showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is an enlarged view of portion 3 in FIG. 1;

FIG. 4 is an enlarged view of portion 4 in FIG. 2;

FIG. 5 is a front elevational view of a second embodiment of the solar cell;

FIG. 6 is a rear elevational view of FIG. 5;

FIG. 7 is an enlarged view of portion 7 in FIG. 5; and,

FIG. 8 is an enlarged view of portion 8 in FIG. 6.

There is no substantial thickness of the claimed design and all elements of the claimed design are flat and coplanar. 

CLAIM The ornamental design for a solar cell, as shown and described. 